Prevent widths less than 1

[pspp-builds.git] / lib / gtksheet / psppire-axis-impl.c

diff --git a/lib/gtksheet/psppire-axis-impl.c b/lib/gtksheet/psppire-axis-impl.c
index 2e9228f3e62868fa556ef397b9ec38107890300e..619e8238dab5c66a5f6d10c738c1351a4fa0de4d 100644 (file)
--- a/lib/gtksheet/psppire-axis-impl.c
+++ b/lib/gtksheet/psppire-axis-impl.c
@@ -40,6 +40,24 @@ struct axis_node
   struct tower_node unit_node;
 };
 
+void
+psppire_axis_impl_dump (const PsppireAxisImpl *a)
+{
+  struct tower_node *n = tower_first (&a->unit_tower);
+
+  g_debug ("Axis %p", a);
+  while (n)
+    {
+      const struct axis_node *an = tower_data (n, struct axis_node, unit_node);
+      const struct tower_node *pn = &an->pixel_node;
+      g_debug ("%ld units of height %g",
+              n->size, pn->size / (float) n->size);
+
+      n =  tower_next (&a->unit_tower, n);
+    }
+  g_debug ("\n");
+}
+
 static gint
 unit_at_pixel (const PsppireAxis *axis, glong pixel)
 {
@@ -132,6 +150,8 @@ total_size (const PsppireAxis *axis)
 }
 
 
+static void resize (PsppireAxis *axis, gint posn, glong size);
+
 
 
 static void
@@ -142,6 +162,7 @@ psppire_impl_iface_init (PsppireAxisIface *iface)
   iface->start_pixel = start_pixel;
   iface->unit_at_pixel = unit_at_pixel;
   iface->total_size = total_size;
+  iface->resize = resize;
 }
 
 /* --- functions --- */
@@ -175,12 +196,10 @@ psppire_axis_impl_get_type (void)
        NULL
       };
 
-
       object_type = g_type_register_static (G_TYPE_PSPPIRE_AXIS,
                                            "PsppireAxisImpl",
                                            &object_info, 0);
 
-
       g_type_add_interface_static (object_type,
                                   PSPPIRE_TYPE_AXIS_IFACE,
                                   &interface_info);
@@ -247,7 +266,7 @@ psppire_axis_impl_append_n (PsppireAxisImpl *a, gint n_units, gint size)
 
   g_return_if_fail (n_units > 0);
 
-  node = pool_alloc (a->pool, sizeof *node);
+  node = pool_malloc (a->pool, sizeof *node);
 
   tower_insert (&a->unit_tower, n_units, &node->unit_node, NULL);
   tower_insert (&a->pixel_tower, size * n_units, &node->pixel_node, NULL);
@@ -285,7 +304,7 @@ split (PsppireAxisImpl *a, gint posn)
 
   fraction = (posn - start) / (gfloat) existing_unit_size;
 
-  new_node = pool_alloc (a->pool, sizeof (*new_node));
+  new_node = pool_malloc (a->pool, sizeof (*new_node));
 
   tower_resize (&a->unit_tower, &existing_node->unit_node, posn - start);
 
@@ -310,7 +329,12 @@ void
 psppire_axis_impl_insert (PsppireAxisImpl *a, gint posn, gint size)
 {
   struct axis_node *before = NULL;
-  struct axis_node *new_node = pool_alloc (a->pool, sizeof (*new_node));
+  struct axis_node *new_node;
+
+  g_return_if_fail ( posn < tower_height (&a->unit_tower));
+  g_return_if_fail ( posn >= 0);
+
+  new_node = pool_malloc (a->pool, sizeof (*new_node));
 
   if ( posn > 0)
     {
@@ -330,7 +354,6 @@ psppire_axis_impl_insert (PsppireAxisImpl *a, gint posn, gint size)
                &new_node->unit_node,
                before ? &before->unit_node : NULL);
 
-
   tower_insert (&a->pixel_tower,
                size,
                &new_node->pixel_node,
@@ -364,15 +387,18 @@ make_single (PsppireAxisImpl *a, gint posn)
 
   g_assert (1 == tower_node_get_size (n));
 
-
   return tower_data (n, struct axis_node, unit_node);
 }
 
-void
-psppire_axis_impl_resize (PsppireAxisImpl *a, gint posn, gint size)
+
+static void
+resize (PsppireAxis *axis, gint posn, glong size)
 {
+  PsppireAxisImpl *a = PSPPIRE_AXIS_IMPL (axis);
+
   struct axis_node *an;
   g_return_if_fail (posn >= 0);
+  g_return_if_fail (size > 0);
 
   /* Silently ignore this request if the position is greater than the number of
      units in the axis */
@@ -385,6 +411,14 @@ psppire_axis_impl_resize (PsppireAxisImpl *a, gint posn, gint size)
 }
 
 
+void
+psppire_axis_impl_resize (PsppireAxisImpl *a, gint posn, gint size)
+{
+  resize (PSPPIRE_AXIS (a), posn, size);
+}
+
+
+
 
 void
 psppire_axis_impl_clear (PsppireAxisImpl *a)
@@ -401,16 +435,34 @@ psppire_axis_impl_clear (PsppireAxisImpl *a)
 void
 psppire_axis_impl_delete (PsppireAxisImpl *a, gint first, gint n_units)
 {
-  gint i;
-  g_warning ("%s FIXME: This is an inefficient implementation", __FUNCTION__);
-
+  gint units_to_delete = n_units;
+  unsigned long int start;
   g_return_if_fail (first + n_units < tower_height (&a->unit_tower));
 
-  for (i = first; i < first + n_units; ++i)
+  split (a, first);
+  split (a, first + n_units);
+
+  struct tower_node *unit_node = tower_lookup (&a->unit_tower, first, &start);
+  g_assert (start == first);
+
+  while (units_to_delete > 0)
     {
-      struct axis_node *an = make_single (a, first);
+      struct tower_node *next_unit_node;
+      struct axis_node *an = tower_data (unit_node,
+                                        struct axis_node, unit_node);
+
+      g_assert (unit_node == &an->unit_node);
+      g_assert (unit_node->size <= n_units);
 
-      tower_delete (&a->unit_tower, &an->unit_node);
+      units_to_delete -= unit_node->size;
+
+      next_unit_node = tower_next (&a->unit_tower, unit_node);
+
+      tower_delete (&a->unit_tower, unit_node);
       tower_delete (&a->pixel_tower, &an->pixel_node);
+
+      pool_free (a->pool, an);
+
+      unit_node = next_unit_node;
     }
 }